DL380 and SuSE 8.0 hanging

Helloone of my company's DL380s hangs after some weeks of work; I cannot do anything more than ping it; no console, either. It has SuSE 8.0 standard on.The other 7 servers go on without this kind of problem. This machine is a file server, so has some smb and nfs shares, and it's connected to the backup unit (Exabyte/IBM via Adaptec 29160).The syslog tells nothing more than time marks.What could it be?